Sharp 20U250 Panduan Servis - Halaman 3

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ADJUSTMENT PRECAUTIONS

This model's setting are adjusted in two different ways: though the I

conventional analog manner. The adjustments via the I

and variable data.

1. Setting the service mode by the microprocessor.

1 Make a short-circuit JA122 and JA124 for a second and release to switch to the service

mode position and the microprocessor is in input mode. (Adjustment through the I

control). (Use JWS Key to set as well).

2 Press the CH DOWN / UP key on the remote controller to get ready to select the mode

one by one.

3 Press the CH DOWN / UP key on the remote controller to select the modes reversibly

one by one.

4 Using the VOLUME UP/ DOWN key on the remote controller, the data can be modified.

5 Make a ashort circuit JA122 and JA124 for a second and release to switch to the normal

mode (OFF) position and the microprocessor is in out of the service mode.

2. Factory Presetting.

1 Make a short-circuit JA122 and JA124 for a second and release to switch to the service

mode position and turn on the main power switch. Initial values are automatically preset,

only when a new EEPROM is used (Judge with the first 4 bytes).

2 The initial data are preset as listed in pages 5-7.

3 Make sure the data need modify or not (Initial data).

Note: Once the chassis has been assembly together and ready to be POWER ON for the

FIRST TIME, make sure to short-circuit JA122 and JA124 to switch to the service

mode position first and then turn on the main power switch. (See 2-1 above).

Precaution: If haven't done this initiation, it may possibly generate excessive Beam

current.

3. For reference please check with memory map

(UA1 Series type RH-IX3410CE Attachment)

C bus control and in the

C bus control include preset-only items

3-1

Ë SERVICE MODE

(1) In the Service Mode, Key is used to select the mode in the following order.

AGC &

GEOMETRIC

MODE

MISC.

OPTION

C bus

MODE

OPTION

MODE

AGC &

GEOMETRIC

MODE

↓

AGC TAKE OVER POINT (AGC)

↓

VERTICAL SLOPE (V-LIN)

↓

VERTICAL AMP (V-AMP)

↓

VERTICAL SHIFT (V-CENT)

↓

HORIZONTAL SHIFT (H-CENT)

↓

HORIZONTAL PARALLELOGRAM (EW//)

↓

EAST-WEST PARABPLA/WIDT (PARA)

↓

HORIZONTAL BOW (HB)

↓

S-CORRECTION (S-COR)

FORWARD : CH DOWN KEY

REVERSE : CH UP

KEY

* (

) means OSD display.

WHITE POINT

ADJ.

MODE

STEREO

ADJ.

MODE

FORWARD : CH DOWN KEY

REVERSE : CH UP

WHITE POINT

ADJ.

MODE

↓

W.P. RED STD. W.T. (DRI-RS)

MAX VOLUME (SUB-VOL)

↓

W.P. GREEN STD. W.T.(DRI-GS)

SUB CONTRAST (SUB-CON)

↓

W.P.BLUE STD. W.P. (DRI-BS)

SUB COLOUR (SUB-COL)

↓

W.P. RED COOL W.P.(DRI-RC)

SUB BRIGHTNESS (SUB-BRI)

↓

W.P. GREEN COOL W.P.(DRI-GC)

SUB TINT (SUB-TINT)

↓

W.P. BLUE COOL W.P. (DRI-BC)

SUB SHARPNESS (SUB-SHP)

↓

W.P. RED WARM W.P.(DRI-RW)

MAX HOTEL VOLUME (HTL-VOL)

↓

W.P. GREEN WARM W.P.(DRI-GW)

HOTEL PROGRAM NO(HTL-PRG)

↓

W.P. BLUE WARM W.P.(DRI-BW)

BLUE BACK CONTRAST (BB-CON)

OSD GRB REFERENCE (RGB)

BLACK LEVEL OFFSET R(CUT-R)

BLACK LEVEL OFFSET G(CUT-G)

CATHODE DRIVE LEVEL(CDL)

3-2

SUB

ADJ.

MODE

Y-DELAY

ADJ.

MODE

OFFSET

ADJ.

MODE

KEY

SUB

ADJ.

MODE

↓